package com.jzx.provider.common.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtil {

    public static int getWorkYear(String startWorkDate) {
        int count = 0;
        Date workDate = DateUtil.strToDate(startWorkDate, "yyyy-MM");
        Calendar cal = Calendar.getInstance();
        if (cal.before(workDate)) { //开始工作日期日期晚于当前时间，无法计算
            return 0;
        }
        int yearNow = cal.get(Calendar.YEAR);  //当前年份
        int monthNow = cal.get(Calendar.MONTH);  //当前月份
        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH); //当前日期
        cal.setTime(workDate);
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH);
        int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
        count = yearNow - year;   //计算整岁数
        if (monthNow <= month) {
            if (monthNow == month) {
                if (dayOfMonthNow < dayOfMonth) count--;//
            } else {
                count--;//
            }
        }
        return count;
    }

    public static int getYearByDate(Date birthDay) throws Exception {
        int age = 0;
        Calendar cal = Calendar.getInstance();
        if (cal.before(birthDay)) { //出生日期晚于当前时间，无法计算
            throw new IllegalArgumentException(
                    "The birthDay is before Now.It's unbelievable!");
        }
        int yearNow = cal.get(Calendar.YEAR);  //当前年份
        int monthNow = cal.get(Calendar.MONTH);  //当前月份
        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH); //当前日期
        cal.setTime(birthDay);
        int yearBirth = cal.get(Calendar.YEAR);
        int monthBirth = cal.get(Calendar.MONTH);
        int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);
        age = yearNow - yearBirth;   //计算整岁数
        if (monthNow <= monthBirth) {
            if (monthNow == monthBirth) {
                if (dayOfMonthNow < dayOfMonthBirth) age--;//当前日期在生日之前，年龄减一
            } else {
                age--;//当前月份在生日之前，年龄减一
            }
        }
        return age;
    }

    public static String dateToStr(Date date) {
        if (date == null) {
            return "";
        }
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return df.format(date);
    }

    public static String dateToStr(Date date, String format) {
        if (date == null) {
            return "";
        }
        SimpleDateFormat df = new SimpleDateFormat(format);
        return df.format(date);
    }

    public static Date strToDate(String dateStr) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = new Date();
        try {
            date = df.parse(dateStr);

        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return date;
    }

    public static Date strToDate(String dateStr, String format) {
        SimpleDateFormat df = new SimpleDateFormat(format);
        Date date = new Date();
        try {
            date = df.parse(dateStr);
        } catch (ParseException e) {

        }
        return date;
    }

    public static Integer compareTimeOnly(Date date1, Date date2) {
        Integer time1 = date1.getSeconds() + date1.getMinutes() * 60 + date1.getHours() * 60 * 60;
        Integer time2 = date2.getSeconds() + date2.getMinutes() * 60 + date2.getHours() * 60 * 60;
        if (time1 > time2) {
            return 1;
        }
        if (time1 < time2) {
            return -1;
        }
        return 0;
    }


    public static void main(String[] args) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date date1 = df.parse("2016-01-01 10:15:00");
            Date date2 = df.parse("2015-01-01 09:15:00");
            System.out.println(DateUtil.compareTimeOnly(date1, date2));
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println(DateUtil.dateToStr(new Date(), "HH:mm:ss"));
    }
}